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Modelling the light curves of Fermi LAT millisecond pulsars
(South African Institute of Physics, 2014)
There are 40 millisecond pulsars (MSPs) in the second pulsar catalogue of the Fermi Large Area Telescope (LAT). This pulsar subpopulation is unique owing to their relatively small magnetospheres. This may result in radio ...
The extended jet in AP Librae as the source of the VHE γ-ray emission
(AIP, 2017)
Most modeling attempts of blazars use a small emission zone located close to the central black hole in order to explain the broad-band spectral energy distribution. Here we present a case where additionally to the small ...
Applying Monte Carlo methods to model multi-wavelength emission of RMHD jet simulations.
(Sissa Medialab, 2019)
Relativistic jets associated with active galactic nuclei (AGN) produce radiation over a large range
of the electromagnetic spectrum. While relativistic magneto-hydrodynamic (RMHD) simulations
have become a powerful tool ...
Finding the four qualities of intelligent industrial reporting
(Stellenbosch Univ, 2019)
Internationally, innovation and technology are driving change
through concepts such as ‘Industry 4.0’. However, due to various
constraints, South Africa is lagging behind in this transformation.
Furthermore, local ...
The influence of CaC03 addition and clay binder selection on electricity efficiency and other operational aspects during pre-reduction of pelletised chromite
(2013)
Production of ferrochrome is an energy intensive process. Pelletised chromite pre-reduction
is most likely the ferrochrome production process with the lowest specific electricity consumption,
i.e. MWh/t ferrochrome ...
Observations of the blazar PKS 2023-07 in flaring state with H.E.S.S. And Fermi-LAT in 2016-2017 and constraints on an intrinsic cut-off
(Sissa Medialab, 2019)
PKS 2023−07 is a flat spectrum radio quasar located at a redshift z = 1.388, farther than any
source currently detected at very high energies (E > 100 GeV). At such energies, absorption by
the extragalactic background ...
Constraining the environment of neutrino-emitting regions in jets of FSRQs
(Sissa Medialab, 2019)
Recently, the gamma-ray blazar TXS 0506+056 has been proposed as the source of neutrino
events detected by IceCube in 2014-15 and 2017. This has further pushed the idea of blazar jets
being among those cosmic sites where ...
GRB observations with H.E.S.S.
(Sissa Medialab, 2019)
Fermi-LAT observations have proven that GeV γ-ray emission is a relatively common feature for
many Gamma Ray Bursts (GRB). However the low effective area of space detectors implies low
statistics for high-energy photons ...
The heliospheric modulation of electrons and positrons over a complete solar cycle
(Sissa Medialab, 2019)
The solutions of a comprehensive three-dimensional drift model are compared to PAMELA and
AMS-02 spectra of electrons and positrons in order to describe and understand their different
modulation down to 1 MeV. This is ...
Isotope solar modulation with the PAMELA experiment 2019
(Sissa Medialab, 2019)
The satellite-borne PAMELA experiment was launched on the 15th June 2006 from the Baikonur
cosmodrome. Since then and until January 2016 PAMELA made high-precision measurements
of the charged component of cosmic-rays ...